1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _THREAD_POOL_IMPL_H 28 #define _THREAD_POOL_IMPL_H 29 30 #include <thread_pool.h> 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 /* 37 * Thread pool implementation definitions. 38 * See <thread_pool.h> for interface declarations. 39 */ 40 41 /* 42 * FIFO queued job 43 */ 44 typedef struct tpool_job tpool_job_t; 45 struct tpool_job { 46 tpool_job_t *tpj_next; /* list of jobs */ 47 void (*tpj_func)(void *); /* function to call */ 48 void *tpj_arg; /* its argument */ 49 }; 50 51 /* 52 * List of active threads, linked through their stacks. 53 */ 54 typedef struct tpool_active tpool_active_t; 55 struct tpool_active { 56 tpool_active_t *tpa_next; /* list of active threads */ 57 pthread_t tpa_tid; /* active thread id */ 58 }; 59 60 /* 61 * The thread pool. 62 */ 63 struct tpool { 64 tpool_t *tp_forw; /* circular list of all thread pools */ 65 tpool_t *tp_back; 66 mutex_t tp_mutex; /* protects the pool data */ 67 cond_t tp_busycv; /* synchronization in tpool_dispatch */ 68 cond_t tp_workcv; /* synchronization with workers */ 69 cond_t tp_waitcv; /* synchronization in tpool_wait() */ 70 tpool_active_t *tp_active; /* threads performing work */ 71 tpool_job_t *tp_head; /* FIFO job queue */ 72 tpool_job_t *tp_tail; 73 pthread_attr_t tp_attr; /* attributes of the workers */ 74 int tp_flags; /* see below */ 75 uint_t tp_linger; /* seconds before idle workers exit */ 76 int tp_njobs; /* number of jobs in job queue */ 77 int tp_minimum; /* minimum number of worker threads */ 78 int tp_maximum; /* maximum number of worker threads */ 79 int tp_current; /* current number of worker threads */ 80 int tp_idle; /* number of idle workers */ 81 }; 82 83 /* tp_flags */ 84 #define TP_WAIT 0x01 /* waiting in tpool_wait() */ 85 #define TP_SUSPEND 0x02 /* pool is being suspended */ 86 #define TP_DESTROY 0x04 /* pool is being destroyed */ 87 #define TP_ABANDON 0x08 /* pool is abandoned (auto-destroy) */ 88 89 extern int pthread_attr_clone(pthread_attr_t *, const pthread_attr_t *); 90 91 extern const sigset_t maskset; /* set of all maskable signals */ 92 93 #ifdef __cplusplus 94 } 95 #endif 96 97 #endif /* _THREAD_POOL_IMPL_H */ 98